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Q: Fachverband Quantenoptik und Photonik
Q 11: Precision Measurements I (joint session Q/A)
Q 11.8: Talk
Monday, March 11, 2024, 18:45–19:00, HS 1221
Coupled states of cold Yb atoms in a high-finesse cavity — •Saran Shaju, Dmitriy Sholokhov, Simon B Jäger, and Jürgen Eschner — Universität des Saarlandes, Experimentalphysik, 66123 Saarbrücken
We study the atom-cavity interaction of cold Yb atoms inside a 5-cm long optical high-finesse cavity that is resonant with its 1S0 → 3P1 intercombination transition at 556 nm wavelength. The atoms are magneto-optically trapped and cooled on their 1S0 → 1P1 transition at 399 nm. We record the cavity output as well as the free-space fluorescence when a probe on 1S0 → 3P1 drives the cavity on axis. By varying the cavity and probe frequency, we observe coupled atom-cavity states with atom number-dependent splitting. We associate the observation to the existence of collective strong coupling of the atoms with the single mode of the resonator. We extend our understanding by simulating the problem using a quantum mechanical mean-field model.
Keywords: Quantumm optics; Cold atoms; Atomic physics; Laser cooling